The headline and lede of the story was about a possible Creed reunion. But if you look at the bottom, he says something pretty interesting about Fret 12:

He credits players like Root for spreading the word about Fret12 and encouraging others to participate. Tremonti says that although some guitarists initially declined when he asked them to join, “people are coming back around and asking to be a part of it.”

He also hints, “I don’t want to let the cat out of the bag, but we’ve got a hugely, hugely famous, incredible, amazing person” who reached out to Tremonti’s camp that is interested in getting onboard with Fret12, and they are in “pretty much the biggest band on earth. It would be a dream come true [if they joined].”

I saw in the comment section of that link and someone said Hammett and that got me thinking, "You know, that's not really an unrealistic thing to happen, thinking about someone from Metallica wanting to do something with Fret12." I'm sure it would probably make Mark's life if Hammett or Hetfield want to do something like a Sound and the Story with Fret12.